Renewable fuse



1 June 1927 P. A. SAVOY RENEWABLE FUSE Filed Jan. 28, 1926 Patented June 14, 1927.

UNITED srA'rEs PHI-LIP A. SAVOY, O13 FULLERTON, CALIFORNIA.

RENEWABLE FUSE.

Application filed January 28, 1926. Serial No. 84,375.

This invention relates to improvements in renewable fuses An ob ect of tlllS'lIlVClltlOIl is'to provide a renewable fuse of improved construction which-is very simple, yet'quite durable.

' each projection 13.

A further object of this invention is to provide a renewable fuse which can be easily, quickly and cheaply maiiuiactured. and which can have its various parts quickly assembled and dissociated. Another-object of-this-invention is to pro vide. a renewable fuse in which the protecting sleeve can be easilyand quickly removed .to permit the fusible element to be easily and quickly replaced.

With the foregoing and other objects In view-which will be made manifest in the following detailed description and specifically pointed out in the appended claims, reference is'had tothe accompanying drawings for an illustrative embodiment of the invention, wherein:

Figure 1 is a side elevation of the improved tuse,

Fig. 2 is a vertical section through the same, i i a a Fig. 31s a view in end-elevation taken in the direction of the arrow 3 upon Fig. 2,

Fig. 4: is a vertical section taken on the line H of Fig. 2,

Fig. ,5 is a view'in'end elevation taken in the direction-of the arrow 5 upon Fig. 2,

Fig. 6 is a view in side elevation, parts being broken away and shown in section, of a fuse of a slightly modified construction, I Y

Fig.7 is a View in end elevation taken in the direction of the arr-0W7 upon Fig. 6,

and

Fig; 8 is a View in end elevation taken in the direction of the arrow 8 upon Fi 6.

Referring to the accompanying drawings wherein slm-ilar reference characters designate similar parts throughout, the improved fuse consists of two end members 10 and 11, each of which has'a cylindrical body from which projects a blade 12. On the opposite side of the body of each of the end members 10 and 11 from the blade 12 there is formed a projection 18, and a recess 14; is formed in The end members 10 and 11 can be formed of castings or in any other suitable manner, and the recesses 14: can either be cored out or drilled out, drilling being preferable. A core of insulation or an insulating member 15 has its ends extending into the recesses 14 and preferably pressed therein, this insulatingmember being preferably circular in cross-section and solid, so that it may serve to'rigidly connect the end members 10 and 11 to each other.

On top of each of the projections 13 and extending between them is a fusible element 16. This iusible element has its ends detach-ably connected to the endmembers as by screws 17, which are threaded into holes provided on thetops of the projections 13.

1X protectivesleeve 18'is provided which has its ends protected by means o1 metallic bands 19 and 20. The external diameter of the end uiembm; l0 is slightly smaller than the external dianiicter of the end. member 11 and the two blades 12 are both shorter in width than the externaldiameters of the end members, of which they form a part. The

exterior ot the end, member 11 isthreaded and the band 20 is provided with complementary threads, these threads being indicated at 21. The band 19 is provided with an inwardly extending flange 22, which fits against the ends of the blade 12 on the end member 10.

' By'this construction it will be readily appreciated that if it is desired to renew or replace the fusible element 16, the sleeve 18 can be rotated, causing the band'20 to be unscrewed from the end member 11, and when this has been done, the sleeve can be caused to slide off over the end member 10,

so that the two screws 17 can be unscrewed and a new member 16 can be replaced. When it is desired to again slide on the sleeve 18, it'is slipped over the end member 10 and is screwed up on. the end member 11, the screwing movement or screwing up being limited by-the engagement between the flange 22 andthe body of the end member 10.

In the modification shown in Fig. 6, the construction is very much the same as that shown in Figs. 1 to 5 inc. with the exception that the end member 11 and the band 20 are not provided with threads, and the flange 22 on the band 19 is such that it forms a hole whose diameter is smaller than the width of the blade 12 on the end member 10. In this modification there are formed two notches 23 in the flange 22, which notches are arranged diametrically opposite each other and are capable of permitting the band 19 and consequently the sleeve 18 to slide over the end member 10. Adjacent the body of the end member 10 in this modification there are formed notches 24L capable of receiving portions of the flange 22. As

indicated in Fig. 7, in applying the sleeve 18 in the modification shown in Fig. 6, the notches 23 receive the ends of the blade '12 on the end member 10, and when the sleeve has been caused to slide onto the fuse, the flange 22 will engage the body of the end member 10. When this'has been done, the sleeve 18 may be rotated about a quarter of a revolution, so that the unnotched portions of the flange 22 will slide into the notches 24, thus locking the sleeve in position so that it encloses and protectsthe insulating member 15 and the fusible element 16.

From the above described construction it will be readily appreciated that there are very few machined parts on the improved fuse, and that it is possible to assemble the .parts during manufacture very quickly.

Furthermore, it is possible to remove the sleeve 18 for purposes of renewing the fusible element 16 very quickly, so that a minimum amount of time is lost in renewing the fusible element 16.

It will be understood that various changes in the detail of construction may be made without departing from the spirit and scope of the invention as defined by the appended claims.

I claim: I

1. A renewable fuse comprising two solid rend members having integral collar-shaped sockets in their opposed faces, an insulating member having its ends extending into said collar-shaped sockets and serving to rigidly conneetsaid end members together, a fusible element connecting the end members, and a sleeve removably positioned over the ends of the end. members, fusible element and insulating member.

2. A renewable fuse comprising two solid end members having collar-shaped sockets on their opposed faces, an insulating member having its ends extending into said sockets and serving to rigidly connect them to each other, a fusible element connecting sald end members, and a sleeveach ted to be caused to slide over oneof the en members and to engage the other end member so as to enclose the fusible element therein.

3. A renewable fuse comprising two solid end members having collar-shaped sockets on their opposed faces, an insulating men her having its ends extending into said sockets in the end members and serving to rigidly connect them to each other, a fusible element connecting the end members, a sleeve 0 adapted to be caused to slide over one of the end members and to engage the other end member so as to enclose the fusible element therein, and means for limiting the sliding movement of the sleeve over the first mentioned member.

4. A renewable fuse comprising two solid end members having recesses in their opposed faees, an insulating member having its ends extending into the recesses in the end members and servin to rigidly connect them, a fusible element having its ends detachably connected to the end members, and a sleeve adapted to slide over one of said end members, said sleeve having bands at its ends, one of said bands having an inwardly extending flange engageable, upon the mentioned end member for limiting the sliding movement of the sleeve thereover, so that the sleeve may assume a position enclosing the fusible element and insulating member. 1

5. A renewable fuse comprising two solid end members having recesses in their opposed faces, an insulating member having its ends extending into the recesses in the end members and serving to rigidly connect them, a fusible element having its ends detachably connected to the end members, a; sleeve adapted to slide over one of said end members, said sleeve having bands :at its ends, one of said bands having an inwardly extending flange engageable upon the mentioned end member for limiting the sliding movement of the sleeve thereover, so that the sleeve may assume a position enclosing the fusible element and insulating member, and means associated with one of said bands for locking the sleeve to an end member.

In testimony whereof I have signed my name to thisspecification.

PHILIP A. SAVOY, 

